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Finding the Fourth Proportional to 375.30, 562.95 and 131.78

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Solution

The fourth proportional to 375.30, 562.95 and 131.78 is: 197.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.30 : 562.95 = 131.78 : x
  2. Step 2: Convert to fraction form
    375.30/562.95 = 131.78/x
  3. Step 3: Cross multiply
    375.30x = 562.95 × 131.78
  4. Step 4: Simplify right side
    375.30x = 74,183.79
  5. Step 5: Solve for x
    x = 74,183.79/375.30
  6. Step 6: Final answer
    x = 197.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.